On Wed, Feb 28, 2018 at 09:26:26AM -0500, Alex Deucher wrote: > + dri-devel > > > On Wed, Feb 28, 2018 at 4:33 AM, S, Shirish <Shirish.S at amd.com> wrote: > > From: Shirish S <shirish.s at amd.com> > > > > Add reverse iterator "for_each_oldnew_plane_in_state_reverse" to > > complement "for_each_oldnew_plane_in_state" way of reading plane > > states. > > > > The plane states are required to be read in reverse order for > > amdgpu, as the z order convention followed in linux is > > opposite to how the planes are supposed to be presented to DC > > engine, which is in common to both windows and linux. > > > > Signed-off-by: Shirish S <shirish.s at amd.com> > > Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma at amd.com> Makes sense. > > --- > > include/drm/drm_atomic.h | 22 ++++++++++++++++++++++ > > 1 file changed, 22 insertions(+) > > > > diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h > > index cf13842..b947930 100644 > > --- a/include/drm/drm_atomic.h > > +++ b/include/drm/drm_atomic.h > > @@ -754,6 +754,28 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p); > > (new_plane_state) = (__state)->planes[__i].new_state, 1)) > > > > /** > > + * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic > > + * update in reverse order Are you sure this renders correctly in kernel-doc? Iirc you have to indent the continuation line. Assuming this is fixed: Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> > > + * @__state: &struct drm_atomic_state pointer > > + * @plane: &struct drm_plane iteration cursor > > + * @old_plane_state: &struct drm_plane_state iteration cursor for the old state > > + * @new_plane_state: &struct drm_plane_state iteration cursor for the new state > > + * @__i: int iteration cursor, for macro-internal use > > + * > > + * This iterates over all planes in an atomic update in reverse order, > > + * tracking both old and new state. This is useful in places where the > > + * state delta needs to be considered, for example in atomic check functions. > > + */ > > +#define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \ > > + (for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \ > > + (__i) >= 0; \ > > + (__i)--) \ > > + for_each_if ((__state)->planes[__i].ptr && \ > > + ((plane) = (__state)->planes[__i].ptr, \ > > + (old_plane_state) = (__state)->planes[__i].old_state,\ > > + (new_plane_state) = (__state)->planes[__i].new_state, 1))) > > + > > +/** > > * for_each_old_plane_in_state - iterate over all planes in an atomic update > > * @__state: &struct drm_atomic_state pointer > > * @plane: &struct drm_plane iteration cursor > > -- > > 2.7.4 > > > > _______________________________________________ > > amd-gfx mailing list > > amd-gfx at lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/amd-gfx > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
